1397776 has 20 divisors (see below), whose sum is σ = 2728000. Its totient is φ = 693792.

The previous prime is 1397761. The next prime is 1397783. The reversal of 1397776 is 6777931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2965 + ... + 3403.

It is an arithmetic number, because the mean of its divisors is an integer number (136400).

2^1397776 is an apocalyptic number.

1397776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1397776 is a deficient number, since it is larger than the sum of its proper divisors (1330224).

1397776 is a wasteful number, since it uses less digits than its factorization.

1397776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its digits is 55566, while the sum is 40.

The square root of 1397776 is about 1182.2757715525. The cubic root of 1397776 is about 111.8096255699.

The spelling of 1397776 in words is "one million, three hundred ninety-seven thousand, seven hundred seventy-six".